Minor comment corrections to FileManagerBrowserTest helpers

Comment only change.

Tbr: slangley
Bug: 833834
Change-Id: I3e554d4fc2dd55811453601947016b49df2f63f7
Reviewed-on: https://chromium-review.googlesource.com/1025500Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553152}

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

@@ -22,7 +22,7 @@ namespace file_manager {
 // second is the JS test case name.
 typedef std::tuple<GuestMode, const char*> TestParameter;
 
-// Test class FileManager browser tests.
+// FileManager browser test class.
 class FileManagerBrowserTest :
       public FileManagerBrowserTestBase,
       public ::testing::WithParamInterface<TestParameter> {
@@ -44,7 +44,7 @@ IN_PROC_BROWSER_TEST_P(FileManagerBrowserTest, Test) {
   StartTest();
 }
 
-// Test class for FileManager browser tests that rely on deprecated event
+// FileManager browser test class for tests that rely on deprecated event
 // dispatch that send tests.
 class FileManagerBrowserTestWithLegacyEventDispatch
     : public FileManagerBrowserTest {